Member

As you can see, 12 cubic inches is about average. 23 cu in seems to be about the cut-off for huge dicks (curiously enough, the 8 x 6 is almost TWICE the mass of the 6 x 5). Getting up around 35 cu in is "Freak Territory," to say the least. And, lurking around 40 cubic inches would be "DLD Country."
Honestly, my goal is to be at least 26-27 cubic inches (which would be around 8.5 x 6.25 or so). That would make me a happy camper.